/*
 Copyright (C) 2008  Maurizio Monticelli

 This program is free software; you can redistribute it and/or modify it under the terms of the 
 GNU General Public License as published by the Free Software Foundation; either version 2 of the 
 License, or (at your option) any later version.

 This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without 
 even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General 
 Public License for more details.

 You should have received a copy of the GNU General Public License along with this program; if not, write 
 to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA 
*/

package ch.justdoit.andriodrpncalc.model.command;

import java.util.ArrayList;


public class CommandProcessor {

	private ArrayList<ICommand> commandList;
	
	public CommandProcessor() {
		commandList = new ArrayList<ICommand>();
	}
	
	public void submit(ICommand command) {
		if (command.doit()) {
			commandList.add(command);
		}
	}
	
	public void undo() {
		if (commandList.size() > 0) {
			ICommand command = commandList.get(commandList.size() - 1 );
			command.undo();
			commandList.remove(commandList.size() - 1);
		}
	}
}
